Safety-valve.



SAFETY VALVE wmmmme man mm '16, web:

web. 27", 1917. SHEETS--SHEET 2.

25 tunnels, etc. A valve of su'l'ic 40 allvndmitti'ngsteam to UNITEDSTATES PATENT OFFICE.

CHARLES Il?. KRAUI, F BLTINEGRE, MARYLAND.

SAFETYVALV llt S ecicutmi of Letters )intentk App-icaton'led fune 26,4Serial No. 105,833.

To allwhom'at may concern.-

Be it known Vthat I, CHARLES F. lnu'ofi, u citizen of the United States,residing at Bal-- 'timore city', State of Meuylend1 lieve inventedcertain new and useful Improvei'nents in Safety-Valves, of which thetollmv ing` is a epecilication. 'The szlfety vulve which is thesubjectniattei' of the present ul'iplication for luttent -is designedmore particularly fot i iu conf nection with locomotive boilers, nliaei.it is not limited to suclnend t e invei' has for'its object to pro videu, .safety 'x sulicient discharging capacity so that i not be ,necessaryt0 equip the boilc:

more than two of suoli/velvet;

The invention also has for ite objtt povde :t safetyynlve having' e mininein amount of lift, and to :iceon'lplish thie x y if out increasing thediameter of the vnlif'e. High litt valves ereept toy discharge weiterwhen placed close to the boiler, and Such lc cation of the valve imposedupon it in 'one Vdel' that the locomotive may cleml heid diameter toAovercome the high ,litt e )mtl requires u liemjr and expeneive eenen towithetimd the 5J{n"? j pre. we@ "which it labors7 the gr'ee'itei' the du3U the vulve, the gi'eutebeing the ep' sure necessary to hold the veagainst the boiler plessiue. Anotlief olijection to n large valve is.that when e 4jeeted .for the blow buch, the large avec between theoutside circumference of the valve and the inside of the adjusting' ringn'mlee the valve slow .to respond, considerable time sing before thevalve pops, "this being;

l' ne othe fucttha-t as'the 'vulve rises guido* the confining chumbei',sucient pressurev muet accumulate to j 'raise the valve. i This, `withthe greet spring tension to overcome, is very objfactionable??4 .fie litcausesV the valve, as 1t lingers, to chatter o1' 4hum, `to the greetannoyance ofthe public.

\ f A further object of? the invention V"is vto eliminate or `reduce to,al minimum the shock i when the valve closes, thus preventing strain onthe boiler and rabid Wear of the valve.

The' invention also has for' its objectV to provide a -novel andimproved :t1-rangement of parts whereby Athe structure issiii'rplied andcheapened y i j f Various otherr objects' `and advantages of,

,rioily by e ring 14 which the invention will be tailed desieriptionappearing hereinitfter, und in neder het 'the saine muy be betterunderstood, reference ifs had to theraccoxnspe'ritietion.

ln the druwingen Figure l 1s a, vertlcalsection ci? the valve, and Figs,2,6 and 4, are

letemtlng; be vi ln thepeseugeway G is ci guide 9 for the vulve l0, saidguide being spaced at its periphery from the well of the passageway `toforni e relatively short to ello-w t discharge opening the Stettin topass. The guide is iuwel with the `vulve casing and has e relaehellowtop recess r11 into Whchthe the bottom. of ,the guideis a nosed ofradial :wins or Webs l2' 'riff-em the center of lthe `guide to thepassageway 6, :tndservin'g ig pi'ee'sui'e. Theldownward or w ino-vementof the vitive iscushioned Lne i fessure trapped beneath it inthe recese'lL lattented Feb. 27,1917.

pointed out in the deforniing a part of this-V of the yzilve extendswhen it-,isl

en the guide to withstand the The relatively fiat guide 9 in the uppei"`end of 'the passageway G forms a steam chamber 1n the ce lng belowthefguide and .winch entende in close proximitytothe disclie-fging pointof the passageway-or the been found that` the" valve seat, lt hasgreater the volume of steam closqto the valve sett the greater thedischarge capacity the valve, therefore thej Vrelsiv'ely*flat 'lheFvalve 10 is in the form of e hollow cess ll and the lower end of thevalve "islencircled extethat it seats 'on topfofthe over 'thedscliergeopening o f Jthe passage# 1s so positieed valve casing 5 guidefgirovides :L chamber close `to the Valve l sect that Vwill contain a,great; volume of 1' way 6, outlet opening being the annular spacebetween the periphery of the guide 9 and the wall of the passageway. Thering 14 is threaded on the inside to screw on the valve, the latterhaving lugs 15 on the outside which are threaded to receive and hold thering.

Between the lugs 15 the valve body is reduced in diameter, whereby steampassageways .1G are'produced. The valve body a so has lugs 17 againstthe bottom of which the ring 14 seats.

,In the top oil the valve casing 5 is an annular recess 18 having itsinner surface screw-threaded to receive the adjusting ring 19, thelatter rising from the top ot the valve rasing and its upper projectingend encircling the ring l1 when the valve l0 is seated. The outerperiphery of the ring 1-1 is beveled inward as shown at 20 which .formsa space 2l between the saine and the .inner periphery olf the projectingportion of the ring 1S). The ring 19 is adjustable up or down to varythe distancrl it projects fromthe top of the valve casing and the areaof the space 21.

The adjustment of the ring 11 effected by a worin 22 meshing with a.worin thread 23 on the periphery oilE the ring. The worm is mounted in atransverse recess 21 in the valve casing 5, and is held against travelin the directimi of its length by a set screw 25 threaded through thevalve casing and having its inner end seating in an annular groove 26 inthe shank of the worm. The ends of the Worm shank are squared for theapplication of. a wrench or other tool for turning the same to effectthe adjustment of the .ring 14. The worm does not broject from the valvecasing to interfere with other parts.

The set screw 25 when screwed in tight engagclneiit with the portion ot'the worm in the groove 2G. will. cffectuz'illy .iock the worm and theadjusting ring.;` l!) in any adjusted position.

Formed integral with the top of the domel 7, at the center thereof, isan enlargement 27 through which is threaded the -adjusting screw 2S ofthe valve spring 221 A. lock nut 3() provided for the screw. spring islocated on the inside of the valve cylinder andis engaged at its endsby' heads o The bottom head seats on the closed lower end of the valve,and the top head seats aaai :ii-t the inner end of the screw'28. The tc;heid has a vent port 32 communicating ith a. vent outlet passageway 33in. the 2o, said passageway opening througi the outer end of the screwto the at'a-osphne. Thus, it will be seen that if any j'irissure istrapped under the valve, it nay escaj'ic to the atmosphere through theducts 13, port 32 and passageway 33.

The upper end of the valve .10 is guided The valve by a cylindricalsleeve 31 into which it extends said sleeve being formed integral Withand depending from the top of the dome 7. The sleeve is spaced from theside of the dome and in this space are radial webs 35 extending betweenthe sleeve and the side wall of the dome, and formed integral therewith.The bottom edges of the webs are Hush 'with the bottom of the sleeve,and on said edges are mounted concentric and spaced baliie rings 36, thesame being connected at intervals by cross webs 37. The rings are lixedto the webs by studs 38 on certain onesl of the latterj and passingthrough apertures in corresponding cross webs I5" the studs being headedor riveted after la ,og passed through the webs. The rings are in linewith the outlet perforations S. i

The only portion of the valve 10 which is exposed to the boiler pressureis that part of the ring 14 which seats over and closes the uppercontracted end of the. passageway 6, the reduction in the area of thepassageway being produced by the guide 9. In view of this restrictedarca exposed to the steam pressure, a much smaller valve spring may beemployed for holding the valve seated against the boiler pressure. IVhenthe valve pops thepressure Aescapes not only through the space 21, butalso through the passageways 1G, resulting in a quick action with aminimum valve lift.

The parts hereinbefore described are so designed that the patterns canbe madey to iin-1n their own core, thus eliminating costly core makingoperations The number of parts is reduced to a minimum, reducing themachining operations required, expediting the handling of the valve inthe process of manufacture, cheapening the cost, and resulting ineconomy in handling and in the purchase of' repair parts. The worm 22being` accessible from the outside of the valve casing. the ring 19 maybe readily adjusted without rel'i'ioving the dome 7 or disturbing anyother parts.

I claim: f

1. In a safety valve, ay casing having a steam passageway, and a muilingdome into which the passageway opens, the outlet end of the passagewaybeing of restricted areaj. and a valve 'havmg a removable externalencircling ring at its lower end which seats over and closes said outletend ofthe passageway, the body of said valve adjacent said encirclingring being reduced in diameter to form steam passageway/s.

2. In a safety valve, a casing having a steam passageway, and a mufilingdome into which the passageway opens, the outlet end of the passagewaybeing of restricted area, and a valve having a removable externalencircling ring. at its lower end Which-seats sageway, the body of saidvalve adjacent said encircling `ring being reduced in diameter to form aseries of lugs to which the encircling ring is secured and steampassagel ways between said lugs.

3. In a safety valve,l a casing having a steam passageway, which thepassageway opens1 the outlet' end ot" the passageway being oi restrictedarea, and a valve having a removable external encircling ring at itslower `end which seats over and closes said outlet end of the passageway, the body of said valve adjacent said encircling ring beingreduced in diameter to forma series of lugs having screwthreaded outerfaces and to which the encircling ring is secured and steam passagewaysbetween` said lugs.

' In a safety valve, a casing having a steam passageway and a muiilingdome into which the passageway discharges, a relatively flat guide inthe upper end of said passagenuiy forming a steam chamber beneath thesaine and spaced from the walls thereof to forni a relatively shortrestricted dischargeopening, said guide being provided with a shallowtop recess, a valve body having its lower end engaging on said recess,anda closing art on said valve body to close said restricted) dischargeopening.

. 5. In a safety valve, a casing having a steam passageway `and amuiiling dome into which the passageway discharges, a relatively flatguide in the Lipper end of said passageway forming a lsteam chamber be-yneath the saine and. spaced from the walls thereml4 to form a relativelyshort restricted discharge opening, said guide being provided with ashallow top recess, a valve body having its lower end engaging on saidrecess', and a closing part on said valve body to close said restricteddischarge opening, that' portion of the valve body which engages saidslmllow being vprovided with steam escape openings.

6. lln asafety valve, a casing having a ste-ain passageway and aniuliling dome into which the passageway discharges, a relatively llatguide 'inthe upper end of said passageway forming a steam chamberbeheath the saine and spaced from the walls th recit to form, a,relatiyely short restricted.

anharge opei'iing, said guide being proand a mullling dome intoA Vthedepending wall, and a screw for the which Athe ,passageway opens, the'outlet end of said .i cling said valve, a support for the ring upon'which 1t is screwed, a worm vided with a shallow top recess and.connected integrally with said casing b radial webs which extend beneathsaid e. i

7. In a safety valve, a casing having a l steam passageway and amuiiling dome into which the passageway opens, a valve closing theoutlet end of the passageway into the dome, a guide sleeve for the valvedependf ing from the top of the dome, radial Webs extending between thesleeve and the side of the dome, and baffle rings mounted on the bottomedges of the webs beneath the space between the sleeve and `the side ofthe dome.

8. In a safety valve, a casing havin a Steam passageway provided with ava veguide and a mailling dome into,l which the passageway opens, anintegral central cylindrical wall depending from the top of saidnniiiling dome and a valve provided with an apertured bottom whichengages in said valve-guide and an elongated cylindrical extension whoseupper end engages and is guided on the interior of said dependingcylindrical wall, a closing spring for the' valve inclosed in itselongated extension and spring adj ustably mounted in the top of thedome and provided with a central passageway for relieving pressure inthe spring chamber and from the valve-guide beneath said perforatedbottom of the valve.

9. In' a safety valve, a casing having a steam passageway and a muiilingdome into a valve closing passageway, an adj ust` ing ring having atoothed periphery encirxnounted and housed in said casing, said wormbeing squared on each end and-provided with an annular grooveintermediate its ends, and a locking screw. adjustably mounted in thewall of said casing in'position to engage in said. annular groove toprevent en ise movement of the worm and to serve asap lock for the worinand adjusting ring.

in testimony whereof I affix my signature in presence-o .y twowitnesses.

CHARLES r. KBA-UT.

AWitnesses:

E. Waldron BREWINGTON, Howano I). ADAMS.

